Respiratory energy costs for the maintenance of biomass, for growth and for ion uptake in roots of Carex diandra and Carex acutiformis

摘要: van der Werf, A., Kooijman, Welschen, R. and Lambers, H. 1988. Respiratory energy costs for the maintenance of biomass, growth ion uptake in roots Carex diandra acutiformis. - Physiol. Plant. 72: 483–491. The respiratory characteristics Schrank acutiformis Ehrh. were investigated. The aims were, firstly to determine root uptake, secondly explain higher rate respiration ATP production C. diandra. The three components derived from a multiple regression analysis, using relative net nitrate as independent variables dependent variable. Although was significantly than acutiformis, two species showed no significant difference their coefficient (the amount per unit biomass produced) (amount ions absorbed). It is concluded that caused by uptake. At relatively high rates contribution total amounted 38 25% respectively. this rate, contributed 37 50%, respectively, production. increased 25 70% with increasing plant age both species. results suggest one major sinks roots. These experimentally values are discussed relation other theoretically values.